CN106873163B - VR head-mounted display - Google Patents
VR head-mounted display Download PDFInfo
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- CN106873163B CN106873163B CN201710214203.4A CN201710214203A CN106873163B CN 106873163 B CN106873163 B CN 106873163B CN 201710214203 A CN201710214203 A CN 201710214203A CN 106873163 B CN106873163 B CN 106873163B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B2027/0192—Supplementary details
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Abstract
The invention discloses a VR head-mounted display, which comprises a body, an infrared lens, an infrared sensor, an infrared interference suppression module and an infrared emission device, wherein the infrared lens, the infrared sensor, the infrared interference suppression module and the infrared emission device are arranged in the body; the infrared sensor is arranged at the mouth of the assembly opening and used for receiving infrared light, converting the received infrared light into an electric signal and sending the electric signal; the infrared interference suppression module is used for receiving the electric signal sent by the infrared sensor and filtering the received electric signal to acquire an electric signal corresponding to infrared light of a sensitive waveband; generating a driving signal according to the electric signal corresponding to the infrared light of the wave band to drive the infrared emitting device to emit the infrared light; the infrared lens is used for receiving the infrared light emitted by the infrared emitting device. According to the VR head-mounted display, the CCD infrared lens is arranged in the VR head-mounted display, interference of reflected infrared light and useless infrared light in an external space is effectively inhibited, the service life of the lens is longer, and positioning accuracy can be effectively improved.
Description
Technical Field
The invention relates to a VR head-mounted display, in particular to a VR head-mounted display with an infrared crosstalk inhibition function.
Background
At present, the VR (virtual reality) head-mounted display mostly adopts the cooperation of an infrared camera, an IMU (inertial measurement unit) and a handle (an infrared lamp on the handle emits infrared light, and then the infrared camera on the VR head-mounted display can capture the infrared light on the handle to emit infrared light) for realizing 6Dof (degree of freedom), three-dimensional real-time modeling of a real environment and day and night space positioning of the handle, so that 6Dof actions in a VR game system and positioning of the handle in a game space are realized. In addition, the VR system can transmit infrared light through a TOF (time of flight) module and receive the infrared light reflected by an object in the space so as to calculate the depth of field of the object in the space, thereby realizing three-dimensional real-time modeling of the real environment. Generally, an infrared camera has better induction to infrared light with a single carrier frequency, but in an environment where a VR system is located, there are sometimes at least a plurality of kinds of infrared light such as infrared light emitted by an infrared lamp on a handle, infrared light emitted by a TOF module and reflected by an object in a space, and infrared light in an environment where the space itself exists. Like this, multichannel superimposed infrared light gets into VR wearing display and goes up infrared sensor after, just can't catch the accurate image of waiting to shoot the structure (like the photosphere) on the handle, leads to the positioning accuracy of handle to go wrong.
Disclosure of Invention
The invention provides a VR head-mounted display, aiming at solving the problem that the existing head-mounted display with an infrared camera is easily interfered by external infrared light, so that the positioning precision of a handle is poor.
In order to solve the technical problems, the invention adopts the following technical scheme:
a VR head-mounted display comprises a body and an infrared lens arranged inside the body, and further comprises an infrared sensor, an infrared interference suppression module and an infrared emission device;
the infrared sensor is arranged at the opening of the assembly opening, and the light-sensitive surface of the infrared sensor faces the outside of the assembly opening and is used for receiving infrared light, converting the received infrared light into an electric signal and sending the electric signal;
the infrared interference suppression module is used for receiving the electric signal sent by the infrared sensor and filtering the received electric signal to acquire an electric signal corresponding to infrared light of a sensitive waveband; generating a driving signal according to the electric signal corresponding to the infrared light of the wave band to drive the infrared emitting device to emit the infrared light;
the infrared lens is used for receiving the infrared light emitted by the infrared emitting device.
Further, the infrared lens is a CCD lens or a CMOS lens.
Furthermore, the infrared interference suppression module comprises an amplifying circuit, a filter circuit and a shaping circuit, the amplifying circuit, the filter circuit and the shaping circuit are arranged on a circuit board, the infrared sensor is connected with the amplifying circuit, the amplifying circuit amplifies a detection signal of the infrared sensor and sends the detection signal to the filter circuit, the detection signal is used for filtering out an electric signal corresponding to infrared light except for a sensitive waveband of the infrared lens, and a driving signal is generated after shaping of the shaping circuit to drive the infrared emitting device to emit the infrared light of the sensitive waveband of the infrared lens.
Furthermore, the circuit board is embedded in the assembly port, and the area of the circuit board is not smaller than that of the assembly port, so that the assembly port is plugged.
Further, the circuit board is a PCB board.
Furthermore, the infrared sensor has a plurality of, infrared interference suppression module and infrared emitter are all one.
Further, when a plurality of infrared sensors are provided, the plurality of infrared sensors are uniformly arranged around the fitting opening.
Further, the amplifying circuit comprises a PNP triode and an NPN triode, wherein a base of the PNP triode is connected to the infrared sensor, an emitter of the PNP triode is connected to the dc power supply, a collector of the PNP triode is connected to a base of the NPN triode, a collector of the NPN triode is connected to the dc power supply, and an emitter of the NPN triode is connected to the ground.
Further, the shaping circuit is a schmitt trigger.
Furthermore, the filter circuit is a band-pass filter circuit composed of a high-pass filter circuit and a low-pass filter circuit.
Compared with the prior art, the invention has the advantages and positive effects that: according to the VR head-mounted display, the infrared lens is arranged inside the body of the VR head-mounted display, so that light rays in an external space are blocked, and the influence of other infrared light in the space on the infrared lens can be avoided, and the principle of the VR head-mounted display is as follows: the method comprises the steps of firstly, detecting infrared light of the full wave band of an external space by using an infrared sensor, carrying out optical-electrical conversion to obtain electric signals corresponding to the infrared light of the full wave band, carrying out signal filtering on the electric signals corresponding to the infrared light of the full wave band by using an infrared interference suppression module, only keeping the electric signals corresponding to the infrared light of the sensitive wave band of an infrared lens, generating driving signals by using the filtered electric signals, driving an infrared emission device to generate the infrared light of the sensitive wave band of the infrared lens, realizing the electrical-optical conversion, receiving the generated infrared light by the infrared lens, effectively suppressing interference of reflected infrared light and space useless infrared due to the fact that the interference suppression module can filter out the electric signals of the infrared light except the sensitive wave band of the infrared lens, enabling the filtered electric signals to reflect the intensity of the infrared light, carrying out the electrical-optical conversion on the filtered signals, only emitting the infrared light of the sensitive wave band of the infrared lens, greatly improving the purity of the positioned infrared light, effectively improving the positioning precision, and further achieving the effect of protecting the infrared lens by arranging the infrared lens in a built-in the infrared lens, ensuring the photosensitive surface of the infrared lens, prolonging the service life of products and effectively enhancing the competitiveness of the infrared lens.
Other features and advantages of the present invention will become more apparent from the detailed description of the embodiments of the present invention when taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of an embodiment of a VR head mounted display according to the present invention;
FIG. 2 is a schematic diagram of a partial structure of an embodiment of a VR head mounted display in accordance with the present invention;
fig. 3 is a schematic circuit diagram of an embodiment of a VR head-mounted display according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
It should be noted that the terms of orientation such as left, right, up, down, etc. in the present embodiment are only relative concepts or reference to the normal use state of the product, and should not be considered as limiting.
Example one
For a VR head mounted display with an infrared lens, the working principle is as follows: the VR peripheral (for example, a game handle) is provided with a plurality of infrared lamps, which can emit infrared light of a sensitive waveband of an infrared lens, an infrared lens arranged on a VR head-mounted display captures infrared light emitted by the infrared lamps, and positions the VR peripheral through the captured infrared light, so as to capture the shape, the action, and the like of the VR peripheral, the infrared light of the sensitive waveband of the infrared lens is also positioning infrared light, and the existing VR head-mounted display directly receives infrared light signals of all frequency bands in an external environment through the infrared lens, although the infrared lens only well senses the infrared light of the sensitive waveband, because the VR system further has a TOF module capable of emitting infrared light, infrared light existing in nature, and the like, and then after multiple paths of superposed infrared light enter the infrared lens, the infrared lens is also interfered, so that the shape of the captured VR peripheral is blurred, and the positioning accuracy of a handle is problematic, based on this, the VR head-mounted display is provided, as shown in fig. 1, and includes a body 11 and an infrared lens 12, and further includes an infrared sensor 13, an infrared interference suppression module 14 and an infrared emission device 16; an assembly opening 110 is formed in the front end face of the body 11, the infrared lens 12 is assembled in the assembly opening 110, ideally, the infrared lens 15 is isolated from external light, the infrared sensor 13 is arranged at the opening of the assembly opening 110, and the light-sensitive surface of the infrared sensor 13 faces the outside of the assembly opening 110 and is used for receiving infrared light, converting the received infrared light into an electric signal and sending the electric signal; the infrared interference suppression module 14 is configured to receive the electrical signal sent by the infrared sensor 13 and perform filtering processing on the received electrical signal to obtain an electrical signal corresponding to infrared light of a sensitive wavelength band of the infrared lens; and generates a driving signal according to the electric signal corresponding to the infrared light of the wave band to drive the infrared emitting device 16 to emit the infrared light, and the infrared lens 12 is used for receiving the infrared light emitted by the infrared emitting device 16. Preferably, the light emitting surface of the infrared emitting device 16 faces the light sensing surface of the infrared lens 12, so that the infrared light emitted by the infrared emitting device 16 can be better collected by the infrared lens 12. The VR head-mounted display of the embodiment blocks light rays of an external space from entering through the built-in infrared lens, avoids directly receiving external environment light, effectively inhibits reflected infrared light and interference of useless infrared light in the external space, and collects useful infrared light.
Because the infrared lens 12 is based on the infrared photosensitive principle, whether visible light exists in the body does not affect the infrared lens, and therefore the infrared light which can be collected by the infrared lens is purer in a closed environment.
The infrared lens 12 may be a CCD lens or a CMOS lens sensitive only to infrared light.
As a preferred embodiment, in this embodiment, the infrared interference suppression module includes an amplifying circuit, a filter circuit, and a shaping circuit, where the amplifying circuit, the filter circuit, and the shaping circuit are disposed on the circuit board 17, the infrared sensor is connected to the amplifying circuit, the amplifying circuit amplifies a detection signal of the infrared sensor, and sends the detection signal to the filter circuit, and the amplification circuit is used to filter out an electrical signal corresponding to infrared light except for a sensitive band of the infrared lens 12, and generates a driving signal after shaping by the shaping circuit, so as to drive the infrared emission device to emit infrared light in the sensitive band of the infrared lens.
The circuit board 17 is embedded in the assembly opening 110, and preferably, the area of the circuit board 17 is not smaller than the area of the assembly opening 110, so as to plug the assembly opening 110, further isolate the CCD infrared lens 12 from external light, and provide an ideal photosensitive environment for the infrared lens 12.
In order to facilitate the circuit board 17 to seal the assembling opening 110, the circuit board 17 is preferably made of a PCB, which is made of a hard material and has certain strength and pressure resistance.
The infrared sensor 13 preferably has a plurality of infrared interference suppression modules and infrared emission devices.
Since the position of the game pad cannot be predicted in advance, when there are a plurality of infrared sensors 13, it is preferable that the plurality of infrared sensors 13 be uniformly arranged around the fitting opening 110, and that infrared light in the external space be uniformly received. In order to protect the infrared sensor 13, a protective cover that should be able to transmit infrared light is preferably provided outside the infrared sensor 13 at the mouth of the fitting opening 110.
As shown in fig. 2, in this embodiment, a specific schematic diagram of an implementation circuit is illustrated, the amplifying circuit includes a PNP triode Q1 and an NPN triode Q2, a base of the PNP triode Q1 is connected to the infrared sensor OPT, an emitter is connected to the dc power source VCC, a collector is connected to a base of the NPN triode Q2, a collector of the NPN triode Q2 is connected to the dc power source VCC, and an emitter is connected to the ground. The amplifying circuit is also connected with current limiting resistors R3, R4 and R5 and is used for amplifying signals collected by the infrared sensor OPT.
When there are a plurality of infrared sensors, the plurality of infrared sensors are connected in parallel in a circuit.
The filter circuit is a band-pass filter circuit consisting of a high-pass filter circuit and a low-pass filter circuit. As shown in fig. 2, the filter mainly includes a high-pass filter circuit capacitor C2, a resistor R6, and low-pass filter circuits R7 and C3. The shaping circuit is preferably implemented using schmitt triggers.
The infrared emitting device 16 is implemented by an infrared light emitting diode, and preferably, a diode corresponding to an infrared lamp arranged on the game handle can be adopted, as shown in fig. 3, and the infrared emitting device 16 is an infrared light emitting diode D1 which can emit infrared light in a frequency band to which the infrared lens 12 is sensitive.
In this embodiment, the infrared lens 12 is taken as an example to be sensitive to 38KHZ infrared carrier waves, and the circuit work flow shown in fig. 3 is as follows:
when the VR system works, 38KHZ infrared carrier waves emitted by VR peripherals (such as game handles) are respectively arranged in the space, 60KHZ infrared carrier waves emitted by a TOF emission module and reflected by the TOF emission module are combined with space useless infrared light to enter an infrared sensor, the infrared sensor performs photoelectric conversion, an electric signal converted from high-frequency infrared clutter is filtered by a bypass capacitor C1, an electric signal of other combined infrared light enters a 38KHZ band-pass (multi-order) filter set according to the required infrared light bandwidth after passing through an amplifying circuit, the 60KHZ and the space useless infrared light are filtered, then the 38KHZ infrared carrier waves are subjected to waveform shaping by a Schmidt trigger U1, then the U1 drives an NMOS tube Q3 to be conducted (the U1 does not act when no useful signal exists), the infrared emission tube D1 works to emit pure 38KHZ infrared light, and a CCD infrared lens in a VR body receives the pure 38KHZ infrared light, so that the accurate action capturing and positioning of the VR peripherals are realized.
In addition, the infrared sensors are arranged in a plurality of array modes and are parallelly arranged on the front end face of the VR body 11, so that the infrared light transmitted from a plurality of directions can be received more favorably, and similarly, the infrared light emitting diodes D1 in the body are also arranged into a plurality of array parallel modules (for example, forming a circle around the inner camera lens) according to the number of the infrared sensors, so that the photosensitive infrared sensor can receive infrared rays in a wider angle and receive multiple paths of infrared rays.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (10)
1. A VR head-mounted display is characterized by comprising a body and an infrared lens arranged in the body, and further comprising an infrared sensor, an infrared interference suppression module and an infrared emission device;
the infrared sensor is arranged at the opening of the assembly opening, and the light-sensitive surface of the infrared sensor faces the outside of the assembly opening and is used for receiving infrared light, converting the received infrared light into an electric signal and sending the electric signal;
the infrared interference suppression module is used for receiving the electric signal sent by the infrared sensor and filtering the received electric signal to acquire an electric signal corresponding to infrared light of a sensitive waveband; generating a driving signal according to an electric signal corresponding to the infrared light of the wave band to drive the infrared emitting device to emit the infrared light;
the infrared lens is used for receiving the infrared light emitted by the infrared emitting device.
2. The VR headset of claim 1, wherein the infrared lens is a CCD lens or a CMOS lens.
3. The VR head-mounted display of claim 1, wherein the infrared interference suppression module comprises an amplifying circuit, a filtering circuit and a shaping circuit, the amplifying circuit, the filtering circuit and the shaping circuit are disposed on a circuit board, the infrared sensor is connected to the amplifying circuit, the amplifying circuit amplifies a detection signal of the infrared sensor and transmits the detection signal to the filtering circuit, and the filtering circuit is configured to filter out an electrical signal corresponding to infrared light except for the sensitive band, shape the electrical signal by the shaping circuit to generate a driving signal, and drive the infrared emission device to emit the infrared light of the sensitive band.
4. The VR head mounted display of claim 3 wherein the circuit board is embedded within the mounting opening and has an area no smaller than an area of the mounting opening for sealing the mounting opening.
5. The VR head mounted display of claim 4 wherein the circuit board is a PCB board.
6. The VR head mounted display of any one of claims 1-5, wherein the infrared sensor has a plurality of infrared sensors, and the infrared interference suppression module and the infrared emission device are both one.
7. The VR head mounted display of claim 6 wherein the plurality of infrared sensors, when present, are evenly spaced around the mounting opening.
8. The VR head mounted display of any of claims 3-5, wherein the amplification circuit includes a PNP transistor and an NPN transistor, the PNP transistor having a base coupled to the infrared sensor and an emitter coupled to the DC power source and a collector coupled to the base of the NPN transistor, the NPN transistor having a collector coupled to the DC power source and an emitter coupled to ground.
9. The VR headset of claim 8, wherein the shaping circuit is a schmitt trigger.
10. The VR headset of claim 9, wherein the filter circuit is a band pass filter circuit comprising a high pass filter circuit and a low pass filter circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710214203.4A CN106873163B (en) | 2017-04-01 | 2017-04-01 | VR head-mounted display |
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| CN201710214203.4A CN106873163B (en) | 2017-04-01 | 2017-04-01 | VR head-mounted display |
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| CN106873163A CN106873163A (en) | 2017-06-20 |
| CN106873163B true CN106873163B (en) | 2023-01-10 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108196258B (en) * | 2017-12-26 | 2020-07-07 | 青岛小鸟看看科技有限公司 | Method and device for determining position of external device, virtual reality device and system |
| CN113238606B (en) * | 2021-05-10 | 2022-11-08 | 青岛小鸟看看科技有限公司 | Infrared-transmitting shell capable of preventing light interference and infrared positioning handle |
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